Rotation phenomenon observed in uncured multiaxial prepreg laminates during compaction

IF 6.5 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Lei Yan , Wenting Ouyang , Bowen Gong , Liwei Zhang , Baofa Cheng , Huan Wang , Hua-Xin Peng
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Abstract

The compaction deformation of uncured thermoset prepregs plays a pivotal role in determining the dimensional accuracy of the final composite parts in the hot press-forming process. This work delves into the investigation of in-plane rotation deformation occurred in multiaxial prepreg laminates during compaction. The influencing factors and deformation mechanism of this in-plane rotation phenomenon were elucidated through experiments and the finite element method. Experimental results show that in-plane rotation occurred in multiaxial laminates, with an average in-plane rotation angle exceeding 6.0° in laminates with continuous stacking pitch angles. The rotation angle increased when the mono-layer thickness was doubled. Finite element analysis reveals that the in-plane rotation was dominated by the interply shear stress between prepreg layers, which is induced by the difference in adjacent layer expansion direction. These findings offer useful insights into the lay-up design and deformation control in the hot press-forming process.

Abstract Image

未固化多轴预浸料层压板在压实过程中观察到旋转现象
在热压成型工艺中,未固化热固性预浸料的压实变形对最终复合材料部件的尺寸精度起着至关重要的作用。本研究深入探讨了多轴向预浸料层压板在压实过程中发生的平面内旋转变形。通过实验和有限元方法阐明了这种面内旋转现象的影响因素和变形机理。实验结果表明,在多轴向层压板中出现了面内旋转现象,在具有连续堆距角的层压板中,平均面内旋转角度超过了 6.0°。当单层厚度增加一倍时,旋转角度增大。有限元分析表明,平面内旋转主要是由相邻层膨胀方向不同引起的预浸料层间互剪应力造成的。这些发现为热压成型工艺中的铺层设计和变形控制提供了有益的启示。
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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